Unit Test - Chemical Reactions

What are the three CHARGES in an atom?

• Electric, charges, fields

• Positive, negative, neutral

• Proton, neutron, electron

What is in the center of an atom?

• Molecules

• Precipitate

• Nucleus

Carbon’s atomic number is 6. How many protons does it have?

• 6

• 12

• 3

Tags

NGSS.MS-PS1-1

Which one is the best example of a mixture?

• Cheese with holes

• Salad with cucumbers

• Ice

A physical change . . . .

• Does NOT result in a new substance.

• Is baking a cake.

• Results in a new substance.

A chemical change . . . .

• Does NOT result in a new substance.

• Is making ice.

• Results in a new substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Label each change as a PHYSICAL or CHEMICAL change. Use a P or C. 11. _____ Butter melting

• P

• C

• B

• M

Tags

NGSS.MS-PS1-4

Label each change as a PHYSICAL or CHEMICAL change. Use a P or C. 12. _____ Tearing paper

• P

• C

• B

• D

Label each change as a PHYSICAL or CHEMICAL change. Use a P or C. 13. _____ Water boiling

• P

• C

• B

• D

Label each change as a PHYSICAL or CHEMICAL change. Use a P or C. 14. _____ Baking a cake

• C

• P

• N

• S

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5